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Finding the Fourth Proportional to 18,831.27, 28,256.18 and 13,320.03

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Solution

The fourth proportional to 18,831.27, 28,256.18 and 13,320.03 is: 19,986.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,831.27 : 28,256.18 = 13,320.03 : x
  2. Step 2: Convert to fraction form
    18,831.27/28,256.18 = 13,320.03/x
  3. Step 3: Cross multiply
    18,831.27x = 28,256.18 × 13,320.03
  4. Step 4: Simplify right side
    18,831.27x = 376,373,098.69
  5. Step 5: Solve for x
    x = 376,373,098.69/18,831.27
  6. Step 6: Final answer
    x = 19,986.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.